There are two things Spaceship Earth is not. First, it's not a giant golf ball, despite the frequently overheard exclamation, "Hey look! There's the giant golf ball!" Second, it's not a dome. In fact, it's two domes built together to create the largest geodesic sphere in the world measuring 180 feet in diameter and 18 stories tall. The outside of the sphere is covered by 11,324 aluminum facets that, when it reflects the lights at night, is a stunning sight to see.